Any one swapped phone for gap between screen and bezel at the top.

I am seeing lot of dust in this area. Gap seems to be bigger on my phone compared to other black phones. There is no gap for white phone. Showed it to ATT store. He tried to swap my phone without any success (big business customers account). Checked with ATT customer service over phone. They refused to swap the device as I am out of 14 days window. I tried convincing her it is 30 days for business customers and I can even change it to differen phone or white S5. Instead she placed a request for warranty replacement for similar black phone. Looks like replacement is a like new phone (refurb). Is it worth changing new phone with refurbished. Am i going to have any issues with water resistant functionality with this gap between screen and bezel.

I am seeing lot of dust in this area. Gap seems to be bigger on my phone compared to other black phones. There is no gap for white phone. Showed it to ATT store. He tried to swap my phone without any success (big business customers account). Checked with ATT customer service over phone. They refused to swap the device as I am out of 14 days window. I tried convincing her it is 30 days for business customers and I can even change it to differen phone or white S5. Instead she placed a request for warranty replacement for similar black phone. Looks like replacement is a like new phone (refurb). Is it worth changing new phone with refurbished. Am i going to have any issues with water resistant functionality with this gap between screen and bezel.

I just checked my device and I don't have this gap...thankfully. I would feel fine with a refurbished device. The S5 is still a very new device so most of the time the refurbs are a result of buyer's remorse so they return the phone.